So, my 2011 XC70 T6 started doing this today when I went to the car wash... grrr. My local Advance Auto Parts parts manager ordered me a new Cooling Fan Relay Control Module which I'm going to pick up tomorrow. Hopefully that will solve the issue... but if I have to replace the whole fan assembly be...

Are the tires the same on the front as they are on the back with the exception being the fronts are newer?

If only it had the 6 Speed Gearbox... :/ It's a beautiful car though!

I had a similar issue with the '95 80 t5r I used to have and it turned-out to be a leaking intake manifold gasket. I pulled the intake off, replaced the PCV system, replaced the throttle body to manifold gasket, replaced the intake manifold gasket, replaced the vacuum line elbows and several cracked...

+1 for warped rotors.

I had this exact same problem on a newer set of slotted/cross-drilled rotors the last owner had installed just before I bought the car when I had it.

I bought a new set of rotors and pads which resolved the problem; no more shuddering when braking at high speeds.

Did your battery go dead?

Great Job! I always thought the automatics blew-up at the 300 HP mark... Nice to see someone still interested in this platform.

P0645 -- Air conditioning (A/C) relay -- Signal missing P1620 -- Engine cooling fan low speed -- Signal missing P1026 -- Throttle Body Internal Fault P1081 -- Fuel immobilzer fault P1031 -- Heated Oxygen Sensor -- Heater Current Monitor Control Circuit (Banks 1&2, Sensor 1) P1017 -- Engine Contr...

erikv11 wrote:Or swap in a sender switch that you know works (borrow one).

lol. That works too.

Were you able to get the problem resolved?

As always gentlemen, thank you for your input. It is very, very much appreciated! I replaced both the cable from the back of the alternator to the solenoid, and the solenoid to the positive post of the battery with brand-new 2 ga. cables. I noticed an instant difference! The starter cranks like it's...